DRILL HAVING TWO OR MORE CUTTING EDGES COMPRISING EXCHANGEABLE CUTTING MEMBERS

摘要

A drill having two or more cutting edges comprising exchangeable cutting members A drill having two or more cutting edges is provided with interchangeable cutting members. The cutting members are fastened by screws in corresponding recesses formed in the drill bit. The cutting members are embodied by interchangeable plates and provided with fastening portions behind the main cutting edge, in the direction of cutting. The screws engage through these fastening portions in threaded bores formed in the front face of the drill bit.